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   getusershell    ( 3 )

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Имя (Name)

getusershell, setusershell, endusershell - get permitted user
       shells

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Синопсис (Synopsis)

#include <unistd.h>

       char *getusershell(void);
       void setusershell(void);
       void endusershell(void);

   Feature Test Macro Requirements for glibc (see
   feature_test_macros(7)):

       getusershell(), setusershell(), endusershell():
           Since glibc 2.21:
               _DEFAULT_SOURCE
           In glibc 2.19 and 2.20:
               _DEFAULT_SOURCE || (_XOPEN_SOURCE && _XOPEN_SOURCE < 500)
           Up to and including glibc 2.19:
               _BSD_SOURCE || (_XOPEN_SOURCE && _XOPEN_SOURCE < 500)

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Описание (Description)

The getusershell() function returns the next line from the file
       /etc/shells, opening the file if necessary.  The line should
       contain the pathname of a valid user shell.  If /etc/shells does
       not exist or is unreadable, getusershell() behaves as if /bin/sh
       and /bin/csh were listed in the file.

       The setusershell() function rewinds /etc/shells.

       The endusershell() function closes /etc/shells.

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Возвращаемое значение (Return value)

The getusershell() function returns NULL on end-of-file.

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Файлы (Files)

/etc/shells

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Атрибуты (Attributes)

For an explanation of the terms used in this section, see
       attributes(7).

       ┌────────────────────────────────────┬───────────────┬───────────┐
       │Interface                           │ Attribute     │ Value     │
       ├────────────────────────────────────┼───────────────┼───────────┤
       │getusershell(), setusershell(),     │ Thread safety │ MT-Unsafe │
       │endusershell()                      │               │           │
       └────────────────────────────────────┴───────────────┴───────────┘

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Стандарты (Conforming to)

4.3BSD.

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Смотри также (See also)

shells(5)

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